Rotary cutter for wood-work



O. E. ZIMMERMANN.

ROTARY CUTTER FOR WOOD WORK.

(No Model.)

N0. 860,794. PatentedApr. 5, 1887.

. formed concavo-convex or U shape 1n crossof cutters mounted on a rotary cutter-head jsponding parts.

UNITED STATES PATE T OFFICE.

CHARLES EQZIMMERMANN, or SYRACUSE, NEW YORK.

ROTARY- CUTTER FOR WOOD-WORK.

SPECIFICATION forming part of Letters Patent No. 360,794, dated April 5, 1887.

Application filed July 15, 1886. Serial No. 208,103. (No model.)

To all whom it 12204;) concern:

Be it known that I, CHARLES E. ZIMMER- MANN, of Syracuse, in th ecounty of Onondaga, in the State of New York, have invented new and useful Improvements in Rotary Gutters for Wood-Work, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

The purpose of this invention is to form countersunken beads in wooden surfaces; and the invention consists in a noyel construction and adapted to form the aforesaid beads in a most rapid and perfect manner, as hereinafter fully explained, and specifically set forth in the claim.

In the annexed drawings, Figure 1 is a side View of my invention. Figs. 2 and 3 are edge views of the same, taken in planes at right angles to each other; and Fig. 4. is a plan view of ablock of wood presenting a sample of work produced by my invention.

Similar letters of reference indicate corre- 0 represents the cutter-head, fastened to a rotary arbor or shaft, A, arranged under the table T, 'which supports the wood to be operated on, and is provided with a slot, through .Which the cutters of the aforesaid cutter-head protrude to operate on the wood, as indicated by dotted lines in Fig. 1 of the drawings. Said cutter-head is formed with arms 0 O O G, to which are securedmy improved cutters D D and D D.

The cutter D consists of an elongated blade section, and with a centrally forward-projecting rounded end, a, and has a continuous cutting-edge around said end and along its sides I) b, and from the convex side at the opposite end projects the shank c, by which said cutter is secured to the arm 0 of the cutter-head, the cutter thus standing with its concavity outward and axially at right angles to the shaft A or axis of the cutter-head, which latter is rotated in the direction indicated by arrows in Fig.1 of the drawings.

The cutter D consists of a blade formed with two parallelehisel-points, d d, projecting from the end thereof, and with a recess, 6, between them, the distance between the chisel cutter-head in such a manner as to cause the cutter to stand with the planes of .its chiselpoints at right angles to the axis of the cutterhead and'in range with or in the path of the longitudinal cutting-edges I) b of the cutter D,

-and at the same distance from the axis of the cutter-head, so that when the latter is rotated the chiselpoints dd of. the cutters D D will cut two continuous parallel slits into the surface of the wood presented to them, and the cutting-edges a b b of the concave cutters D D will out between and adjacent to the aforesaid slits, and thus form a smoothly-outlined countersunken bead, B, as represented by dotted lines in Fig. 2 of the drawings. By forming such beads at right angles to each other I obtain the checkered bead-work, as illustrated in Fig. 4 of the drawings. 7

In order to permit of adjusting the cutters D D so as to stand at the requisite distance from the axis of the cutter-head, I provide the attaching-shanks of the cutters with longitudinal slots in for the reception of the screw or bolt 1, by which they are fastened to the arms 0 G, and to properly sustain said cutters laterally I providethe arms 0 O with recessed seats .9, into which the attachingshanks of the cutters are snugly fitted.

I do not claim, broadly, the cutter formed concave-convex in cross-section and sharpened around the end and side edges, as I am aware the same is not new 5 and I am also aware that cutters with chisel-points and an intermediate recess have been in use on various tools; but in no instance have the aforesaid cutters been arranged on a rotary cutter-head, so as to cause one to follow in the path of the other and cooperate to produce the work herein specified. Therefore that I do claim specifically is The combination, with the rotary cutter head, of cutters formed concavo convex in cross-section and sharpened around their end and side edges, and secured to the cutter-head with the concavity outward and axially at right angles to the cutter-head, and intermediate aux iliary cutters, each formed with parallel chiselpoints, and with a recess between said chiselmy name and affixed my seal, in the presence points, and secured to the cutter-head with the. of two attesting witnesses, at Syracuse, in the In planes of the chisel-points at right angles to county of Onondaga, in the State of New York,

the axis of the cutter-head and in the paths this 12th day of July, 1886.

5 of the sharpened side edges of the concavo- CHARLES ZDUIERMANN. [L. convex cutter, substantially as described and Witnesses:

shown. FREDERICK H. GIBBS,

In testimony whereof I have hereunto signed C. BENDIXON. 

